Plato’s Republic probably one of the titular titles anyone thinks of when they contemplate ancient philosophy—and for good reason. Unlike contemporaries such as Zeno and Aristotle, Plato’s theories of forms and intense commitment to a political meritocracy still have meaning and application, even over two thousand years after they were written. And unlike even more “modern” philosophers like Kant or Mill, Plato’s political and ethical theories are startlingly modern and mostly devoid of unsavory biases like apologetics for colonialism or musings on the inherent inferiority of the female sex. Plato’s Republic is a masterwork of epistemology, metaphysics, ethics, and political philosophy. Any inspiring philosopher really ought to have this title under his or her belt—not only for posterity, but also because it truly is good enough to stand the test of the millennia solely on its own merits.— Jennie
The Republic is a Socratic dialogue, written by Plato around 380 BC, regarding the definition of justice, the social order and character of the just city and state, and the just and free man.